Steam boiler firebox



1943- c. E. HARTLEY 2,327,522

- STEAM BOILER FIRE BOX Filed June 9, 1942 3 Sheets-Sheet l I nventar c. E. HARTLEY 2,327,522

STEAM BOILER FIRE BOX Filed June 9, 1942 3 Sheets-Sheet 2 Ware/we filffj/ gcl E. HARTLEY 2,327,522

STEAM BOILER FIRE BOX Filed June 9, 1942 5 SheetsSheet 5.

Inventor 6 6 ,51 f/arffaj A 8. 222mm.

Arm-n95 V Patented Aug. 2 4, 1943 STEAM BOILER mmex Clarence E. Hartley, Salisbury, N. 0., assignor of ,one-half to William T. Curlee, Salisbury, C.

A plication June 9, 1942, Serial No. 446,391

2 Claims. (Cl. 122-68),

The present invention relates to new and use-' ful improvements in fire boxes, particularly for steam locomotive boilers, and has for its primary V of the sheet, excessive -,wearing of the crown sheet, et cetera, by cinders.

Another very important object of the invention is to provide an overheadjarch of the afore-' mentioned character for steam locomotive boiler fire boxes comprising a unique construction and arrangement ofsupporting'tubes for the circulation of the boiler water. r

" Other objects of the invention are to provide an overhead arch for boiler fireboxes which will be comparatively, simple in constructiqni strong,

- durable, highlyefficientjand reliable in use and V which may be manufactured. at low cost.

in'Figure 2 of the drawings, A longitudinal tube til has one end connected to the tube 9 at an intermediate point and its other'end connected to the sheetl I of the fire box I. i

The space between the tube '9 and the crown sheet 2 of the fire box I is closed by a series of fire bricks l2. The lower ends of the fire bricks [2 have formed thereintransverse grooves 'or channels l3 for the receptionof the tube 9. The two All of the foregoing and'still further objects and advantages of the invention will become ap-f parent from a study of the following spebification, taken in connection with the accompanying drawings wherein like characters of reference designate corresponding parts throughout the threadedly mounted in the boiler H in alignment several views, and wherein:

. Figure l is a view in vertical longitudinalsec tion through a locomotive fire box comprising an overhead arch constructed in accordanc with the present invention.

Figure 2 is a cross-sectional View, taken substantially on the line 2 2 of Figure 1; V Figure 3 is a fragmentaryview inside 7 eleva-v tion of the boiler.

Figure 4 is a perspective view of the bricksup '40 Figure 5 is a detail View in side elevation of porting and water circulating tubes.

one of the washout plugs. a i 7 Referring now to the drawings in detail, it will be seen that reference numeral 1 designates generally a locomotive fire box comprising a i It is believed that the many advantages'of an overhead'alrch constructed in accordance with the present invention will be readily understood, and although a preferred embodiment of said crown sheet 2, side sheets 3, a fire door opening 4, et cetera. Mounted in the fire box I is the usual arch 5 comprising a plurality of circulating'tub'es' ii having'mounted thereon fire bricks i.

.Mo-unt'ed transversely in the upper portion of the firebox l, at an intermediate point, is an overhead arch 8. In the embodiment showmthe arch 3 includes a tube 9 which extends between the side sheets 3 of the fire bOXJ'L' Ihe tube 9 is of the longitudinal shapeshownto advantage innermost bricks l2 are also formed. or shaped on. their lower ends to accommodate the adja cent end portion of thetube l0. Depending from the rear portions of the bricks n are .integral shields or lips it which protect the tube 9 from forwardly flowing cinders.

It is thought that the manner in which the invention functions will be. readily apparent from a consideration of the foregoing. Briefly, the construction and arrangement oithe overhead arch 8 is such as to change the draft in a manner to preventthecinders from striking, as at prescut, the crown sheet and the crown sheet bolt heads of the fire boxl. The cinders, after moving underthe arch 8, move forwardly and when they enter the boiler flues they are traveling in a direction substantially in alignment with said fiues thereby preventing the cuttingout of the fines in the boiler ahead of the sheet l5. .The Water in the boiler circulates freely through the tubes 9 and It in a manner to materially promote Removable washout plugs iii are with the endsof the'tube9. Ashereinbefore stated, the lipsf'or shields l4 protect the tube 9 against damage from cinders;

arch is as illustrated and described, it is to be understood that changes in the details of, con-v r struction and in the combination and arrangement of parts may be resorted which will fall .What is claimed is:

1. The combination with a locomotive fire box including a crown; side and a back sheet, respectivel and'an arch above the bottom of said box including longitudinally extending tubes and a wall thereon forming a rearo'pening in thearch, of an auxiliary'draft deflecting transverse arch in said box above the arch first mentioned and spaced forwardly of said opening, said auxiliary arch comprising a water circulating tube extendf ing between the side sheetsand anchored therein,

a refractory brick wall supported by said tube and closing the space between the tube and the crown sheet, and a longitudinal 'water circulating tube spaced forwardly of said opening, said auxiliary arch comprising a water circulating tube extend ing between the side sheets and anchored therein, a refractorybrick wall supportedvby said tube and closing the space between the tube and the crown sheet, and a longitudinal water circulating T I tube extending between the firstmentioned tube and the rear sheet of the fire box in the center of v 7 said box, said bricks having depending lips covering the sideoithe first mentioned tube nearest v a said opening to protect said tube.

. CLARENCE E. HA TLEY. 

